JP7375037B2 - Terminals, wireless communication methods, base stations and systems - Google Patents

Description

The present disclosure relates to a terminal , a wireless communication method, a base station, and a system in a next-generation mobile communication system.

In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) has been specified for the purpose of higher data rates, lower delays, etc. (Non-Patent Document 1). Furthermore, LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of further increasing capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).

Successor systems to LTE (for example, also referred to as 5th generation mobile communication system (5G), 5G+ (plus), New Radio (NR), 3GPP Rel. 15 or later) are also being considered.

3GPP TS 36.300 V8.12.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)”, April 2010

In future wireless communication systems (e.g. NR), user terminals (terminals, user terminals, User Equipment (UE)) will control transmission and reception processing based on information about quasi-co-location (QCL). It is being considered to do so.

However, it is not clear how to determine a reference signal (RS) for at least one of QCL and path loss calculation in receiving downlink (DL) signals or transmitting uplink (UL) signals. If the UE does not determine an appropriate reference signal, system performance may deteriorate, such as throughput reduction.

Therefore, one object of the present disclosure is to provide a terminal , a wireless communication method, a base station, and a system that appropriately determine a reference signal for at least one of QCL and path loss calculation.

A terminal according to an aspect of the present disclosure includes a receiving unit that receives information regarding one transmission configuration indication (TCI) state for a control resource set (CORESET), and a component carrier of a sounding reference signal (SRS) resource. When the CORESET is set, a control unit that uses a reference signal of the one TCI state, which is a quasi colocation assumption of the CORESET, for the spatial relationship for the SRS and the path loss estimation for the SRS; and the control unit is configured such that spatial relationship information is not set for a first SRS resource in the SRS resource set, and spatial relationship information is not set for a second SRS resource in the SRS resource set. If relationship information is not set and the time of the second SRS resource is different from the time of the first SRS resource, the same spatial relationship is applied to the first SRS resource and the second SRS resource. I will .

According to one aspect of the present disclosure, a reference signal for at least one of QCL and path loss calculation for uplink transmission can be appropriately determined.

FIG. 1 is a diagram illustrating an example of a PDSCH QCL assumption. FIG. 2 is a diagram illustrating an example of the default spatial relationship of SRS. FIG. 3 is a diagram illustrating an example of DL-RS for path loss calculation when a single TCI state is activated for PDCCH. FIG. 4 is a diagram illustrating an example of DL-RS for path loss calculation when multiple TCI states are activated for PDCCH. FIG. 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. FIG. 6 is a diagram illustrating an example of the configuration of a base station according to an embodiment. FIG. 7 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. FIG. 8 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment.

(Transmission power control)
<PUSCH transmission power control>
In NR, the transmission power of PUSCH is controlled based on the TPC command (also referred to as value, increase/decrease value, correction value, etc.) indicated by the value of a predetermined field (also referred to as TPC command field, etc.) in DCI. .

For example, a UE uses a parameter set (open loop parameter set) with index j, an index l of a power control adjustment state (PUSCH power control adjustment state) to determine the active UL of carrier f of serving cell c. When transmitting PUSCH on BWP b, the transmission power of PUSCH at PUSCH transmission occasion (also referred to as transmission period, etc.) i ( _{PUSCH, b, f, c} (i, j, q _d , l)) may be represented by the following formula (1). The power control adjustment state may be referred to as a value based on a TPC command of the power control adjustment state index l, a cumulative value of TPC commands, or a value based on a closed loop. l may be called a closed loop index.

Further, the PUSCH transmission opportunity i is a period during which the PUSCH is transmitted, and may be composed of one or more symbols, one or more slots, etc., for example.

Here, P _CMAX,f,c(i) is, for example, the transmission power of the user terminal (also referred to as maximum transmission power, UE maximum output power, etc.) set for carrier f of serving cell c at transmission opportunity i. . P _{O_PUSCH, b, f, c} (j) is, for example, a parameter related to the target received power set for the active UL BWP b of carrier f of serving cell c in transmission opportunity i (for example, a parameter related to transmit power offset, (also referred to as power offset P0, target received power parameter, etc.).

M ^PUSCH _RB,b,f,c (i) is, for example, the number of resource blocks (bandwidth) allocated to PUSCH for transmission opportunity i in active UL BWP b of serving cell c and carrier f with subcarrier spacing μ . α _b,f,c (j) are values provided by upper layer parameters (for example, also referred to as msg3-Alpha, p0-PUSCH-Alpha, fractional factor, etc.).

PL _{b, f, c} (q _d ) is, for example, a reference signal (RS) for downlink BWP associated with active UL BWP b of carrier f of serving cell c, path loss reference RS, path loss reference RS, This is the path loss (path loss estimation [dB], path loss compensation) calculated by the user terminal using the index q _d of the measurement DL-RS, PUSCH-PathlossReferenceRS).

If the UE is not provided with a path loss reference RS (e.g. PUSCH-PathlossReferenceRS) or if the UE is not provided with individual upper layer parameters, the UE uses a synchronization signal (SS) to obtain the Master Information Block (MIB). PL _b,f,c (q _d ) may be calculated using RS resources from a /physical broadcast channel (PBCH) block (SS block (SSB)).

If the UE is configured with a number of RS resource indexes up to the value of the maximum number of pathloss reference RSs (e.g., maxNrofPUSCH-PathlossReferenceRSs) and a set of respective RS configurations for the RS resource indexes by pathloss reference RSs, The set of RS resource indices may include one or both of a set of SS/PBCH block indices and a set of channel state information (CSI)-reference signal (RS) resource indices. The UE may identify an RS resource index q _d within the set of RS resource indexes.

If the PUSCH transmission is scheduled by a Random Access Response (RAR) UL grant, the UE may use the same RS resource index q _d as for the corresponding PRACH transmission.

The UE is provided with a PUSCH power control setting (e.g., SRI-PUSCH-PowerControl) using a sounding reference signal (SRS) resource indicator (SRI), and is provided with one or more values of the ID of the path loss reference RS. If the mapping between the set of values for the SRI field in DCI format 0_1 and the set of ID values of the path loss reference RS is performed using upper layer signaling (e.g. sri-PUSCH in -PowerControl-Id). The UE may determine the RS resource index q _d from the ID of the path loss reference RS mapped to the SRI field value in the DCI format 0_1 that schedules the PUSCH.

If the PUSCH transmission is scheduled with DCI format 0_0 and the UE is not provided with PUCCH spatial relationship information for the PUCCH resource with the lowest index for the active UL BWP b of each carrier f and serving cell c, the UE The same RS resource index q _d may be used for PUCCH transmission within the resource.

If the PUSCH transmission is scheduled by DCI format 0_0 and the UE is not provided with the spatial setting of PUCCH transmission, or if the PUSCH transmission is scheduled by DCI format 0_1 which does not include the SRI field, or if the power control of PUSCH by SRI If no configuration is provided to the UE, the UE may use an RS resource index q _d with a path loss reference RS ID of zero.

For a PUSCH transmission configured by a configured grant configuration (e.g., ConfiguredGrantConfig), if the configured grant configuration includes a predetermined parameter (e.g., rrc-ConfiguredUplinkGrant), the RS resource index is determined by the path loss reference index (e.g., pathlossReferenceIndex) in the predetermined parameter. q _d may be provided to the UE.

For PUSCH transmission configured by the configuration grant configuration, if the configuration grant configuration does not include the predetermined parameters, the UE activates the PUSCH transmission from the value of the ID of the path loss reference RS mapped to the SRI field in the DCI format. A resource index q _d may be determined. If the DCI format does not include an SRI field, the UE may determine an RS resource index q _d with a path loss reference RS ID of zero.

Δ _TF,b,f,c (i) is the transmission power adjustment component (offset, transmission format compensation) for UL BWP b of carrier f of serving cell c.

f _b,f,c (i,l) is the PUSCH power control adjustment state for active UL BWP b of carrier f of serving cell c at transmission opportunity i. For example, f _b,f,c (i,l) may be expressed by equation (2).

Here, δ _{PUSCH, b, f, c} (i, l) is the TPC command value included in DCI format 0_0 or DCI format 0_1 that schedules PUSCH transmission opportunity i on active UL BWP b of carrier f of serving cell c. , or a TPC command value encoded in conjunction with other TPC commands in DCI format 2_2 with a CRC scrambled by a particular Radio Network Temporary Identifier (RNTI) (e.g. TPC-PUSCH-RNTI). It's okay.

Σ _m=0 ^C(Di)-1 δ _PUCCH,b,f,c (m,l) is the sum of TPC command values in the set D _i of TPC command values with cardinality C(D _i ) It may be. D _i is K _PUSCH (ii ₀ )-1 symbols before PUSCH transmission opportunity ii ₀ on active UL BWP b of carrier f of serving cell c, and PUSCH transmission opportunity It may be a set of TPC command values received before and after K _PUSCH (i) symbols of i. i ₀ may be the smallest positive integer such that K _PUSCH (ii ₀ ) symbols before PUSCH transmission opportunity ii 0 is earlier than K _PUSCH (i) symbols before PUSCH transmission _opportunity i.

If a PUSCH transmission is scheduled according to DCI format 0_0 or DCI format 0_1, K _PUSCH (i) is the number of serving cells after the last symbol of the corresponding PDCCH reception and before the first symbol of the corresponding PUSCH transmission. It may be the number of symbols in active UL BWP b of carrier f of c. If PUSCH transmission is configured by configured grant configuration information (ConfiguredGrantConfig), K _PUSCH (i) is the number of symbols per slot N _symb ^slot in active UL BWP b of carrier f of serving cell c, and PUSCH common configuration information (PUSCH-ConfigCommon) may be the number of K _PUSCH,min symbols equal to the product of the minimum value provided by k2 in (PUSCH-ConfigCommon).

The power control adjustment state may be set to have a plurality of states (for example, two states) or a single state depending on upper layer parameters. Further, when a plurality of power control adjustment states are set, one of the plurality of power control adjustment states may be identified by an index l (for example, lε{0,1}).

Note that equations (1) and (2) are merely examples, and are not limited thereto. The user terminal only needs to control the transmission power of the PUSCH based on at least one parameter exemplified in equations (1) and (2), and may include additional parameters, or may include some parameters. May be omitted. Further, in the above equations (1) and (2), the transmission power of the PUSCH is controlled for each active UL BWP of a certain carrier in a certain serving cell, but the control is not limited thereto. At least some of the serving cell, carrier, BWP, and power control adjustment state may be omitted.

<Transmission power control for PUCCH>
In addition, in NR, the PUCCH transmission power is determined by the TPC command (value, increase/decrease value, correction value, instruction value) indicated by the value of a predetermined field (TPC command field, first field, etc.) in the DCI. , etc.).

For example, the index l of the power control adjustment state (PUCCH power control adjustment state) is used to determine the PUCCH transmission occasion (also known as the transmission period, etc.) for the active UL BWP b of carrier f of serving cell c. ) The transmission power of PUCCH at i (P _{PUCCH, b, f, c} (i, q _u , q _d , l)) may be expressed by the following formula (3). The power control adjustment state may be referred to as a value based on a TPC command of the power control adjustment state index l, a cumulative value of TPC commands, or a value based on a closed loop. l may be called a closed loop index.

Further, the PUCCH transmission opportunity i is a period during which the PUCCH is transmitted, and may be composed of one or more symbols, one or more slots, etc., for example.

Here, P _CMAX,f,c (i) is, for example, the transmission power of the user terminal (also referred to as maximum transmission power, UE maximum output power, etc.) set for carrier f of serving cell c at transmission opportunity i. . P _{O_PUCCH,b,f,c} (q _u ) is, for example, a parameter related to the target received power set for the active UL BWP b of the carrier f of the serving cell c in the transmission opportunity i (for example, a parameter related to the transmit power offset, (also referred to as transmission power offset P0, target reception power parameter, etc.).

M ^PUCCH _RB,b,f,c (i) is, for example, the number of resource blocks (bandwidth) allocated to PUCCH for transmission opportunity i in active UL BWP b of serving cell c and carrier f with subcarrier spacing μ . PL _{b, f, c} (q _d ) is, for example, a reference signal for downlink BWP (path loss reference RS, path loss reference RS, path loss measurement DL-RS, This is the path loss (path loss estimation [dB], path loss compensation) calculated by the user terminal using the index q _d of PUCCH-PathlossReferenceRS).

If the UE is not provided with pathloss reference RSs (pathlossReferenceRSs), or before the UE is provided with individual upper layer parameters, the UE uses the RS resources obtained from the SS/PBCH block that the UE uses to obtain the MIB. The path loss PL _{b, f, c} (q _d ) is calculated using

If the UE is given pathloss reference RS information (pathlossReferenceRSs in PUCCH power control information (PUCCH-PowerControl)) and not given PUCCH spatial relationship information (PUCCH-SpatialRelationInfo), the UE receives pathloss reference RS information for PUCCH. Obtain the value of the reference signal in the PUCCH path loss reference RS from the PUCCH path loss reference RS-ID (PUCCH-PathlossReferenceRS-Id) having index 0 in (PUCCH-PathlossReferenceRS). This reference signal resource is either on the same serving cell or, if provided, on the serving cell indicated by the value of pathloss reference linking information (pathlossReferenceLinking). The path loss reference association information indicates which DL of the special cell (SpCell) or the secondary cell (SCell) corresponding to this UL is applied as a path loss reference by the UE. SpCell may be a primary cell (PCell) in a master cell group (MCG) or a primary secondary cell (PSCell) in a secondary cell group (SCG). Path loss reference RS information indicates a set of reference signals (for example, CSI-RS configuration or SS/PBCH block) used for PUCCH path loss estimation.

_{ΔF_PUCCH} (F) is an upper layer parameter given for each PUCCH format. Δ _TF,b,f,c (i) is the transmission power adjustment component (offset) for UL BWP b of carrier f of serving cell c.

g _{b, f, c} (i, l) is a value based on the TPC command of the power control adjustment state index l of the active UL BWP of carrier f of serving cell c and transmission opportunity i (e.g., power control adjustment state, TPC command cumulative value, closed-loop value, PUCCH power adjustment state). For example, g _b,f,c (i,l) may be expressed by equation (4).

Here, δ _{PUCCH, b, f, c} (i, l) is a TPC command value, and is the DCI format 1_0 or DCI format detected by the UE in PUCCH transmission opportunity i of active UL BWP b of carrier f of serving cell c. 1_1 or may be encoded in combination with other TPC commands in DCI format 2_2 with a CRC scrambled by a specific RNTI (Radio Network Temporary Identifier) (e.g., TPC-PUSCH-RNTI) .

Σ _m=0 ^C(Ci)-1 δ _PUCCH,b,f,c (m,l) is the sum of TPC command values in the set C _i of TPC command values with cardinality C(C _i ) It may be. C _i is K _PUCCH (ii ₀ )-1 symbols before PUCCH transmission opportunity ii ₀ of active UL BWP b of carrier f of serving cell c for PUCCH power control adjustment state l, and PUSCH transmission opportunity i It may be a set of TPC command values received before and after the K _PUCCH (i) symbol. i ₀ may be the smallest positive integer such that K _PUCCH (ii ₀ ) symbols before PUSCH transmission opportunity ii 0 is earlier than K _PUCCH (i) symbols before PUSCH _transmission opportunity i.

If the PUCCH transmission is in response to the detection of DCI format 1_0 or DCI format 1_1 by the UE, K _PUCCH (i) must be , may be the number of symbols in active UL BWP b of carrier f of serving cell c. If PUCCH transmission is configured by configured grant configuration information (ConfiguredGrantConfig), K _PUSCH (i) is the number of symbols per slot N _symb ^slot in active UL BWP b of carrier f of serving cell c, and PUSCH common configuration information (PUSCH-ConfigCommon) may be the number of K _PUCCH,min symbols equal to the product of the minimum of the values provided by k2 in (PUSCH-ConfigCommon).

If the UE is provided with information indicating to use two PUCCH power control adjustment states (twoPUCCH-PC-AdjustmentStates) and PUCCH spatial relationship information (PUCCH-SpatialRelationInfo), then l = {0, 1}. , l=0, if the UE is not provided with information indicating that two PUCCH power control adjustment states are used, or PUCCH spatial relationship information.

If the UE obtains the TPC command value from DCI format 1_0 or 1_1, and if the UE is provided with PUCCH spatial relationship information, the UE receives the P0 ID for PUCCH (p0-Set in PUCCH-PowerControl in PUCCH-Config). The mapping between the PUCCH spatial relationship information ID (pucch-SpatialRelationInfoId) value and the closed loop index (closedLoopIndex, power adjustment state index l) may be obtained by the index provided by the p0-PUCCH-Id in the PUCCH spatial relation information ID (pucch-SpatialRelationInfoId) value. If the UE receives an activation command that includes the value of the PUCCH spatial relationship information ID, the UE may determine the value of the closed loop index providing the value of l through the link to the corresponding PUCCH P0 ID. .

If the UE configures the P _{O_PUCCH,b,f,c} (q _u ) value for the corresponding PUCCH power adjustment state l for the active UL BWP b of carrier f of serving cell c, then g _{b, f, c} (i, l)=0, k=0, 1,...,i. If the UE is provided with PUCCH spatial relationship information, the UE may determine _q based on the PUCCH spatial relationship information associated with PUCCH P0 ID corresponding to q The value of l may be determined from the value of _u .

q _u may be a P0 ID for PUCCH (p0-PUCCH-Id) indicating P0 for PUCCH (P0-PUCCH) in a P0 set for PUCCH (p0-Set).

Note that equations (3) and (4) are merely examples, and are not limited thereto. The user terminal only needs to control the PUCCH transmission power based on at least one parameter exemplified in equations (3) and (4), and may include additional parameters, or may include some parameters. May be omitted. Further, in the above equations (3) and (4), the transmission power of the PUCCH is controlled for each active UL BWP of a certain carrier in a certain serving cell, but the control is not limited thereto. At least some of the serving cell, carrier, BWP, and power control adjustment state may be omitted.

<SRS transmission power control>
For example, the transmission of SRS on an SRS transmission occasion (also referred to as a transmission period, etc.) i for active UL BWP b of carrier f of serving cell c using index l of power control adjustment state. The power (P _{SRS, b, f, c} (i, q _s , l)) may be expressed by the following formula (5). The power control adjustment state may be referred to as a value based on a TPC command of the power control adjustment state index l, a cumulative value of TPC commands, or a value based on a closed loop. l may be called a closed loop index.

Further, the SRS transmission opportunity i is a period during which SRS is transmitted, and may be composed of one or more symbols, one or more slots, etc., for example.

Here, P _CMAX,f,c (i) is, for example, the UE maximum output power for carrier f of serving cell c in SRS transmission opportunity i. P _{O_SRS,b,f,c} (q _s ) is provided by p0 for active UL BWP b of carrier f of serving cell c and SRS resource set q _s (provided by SRS-ResourceSet and SRS-ResourceSetId). This is a parameter related to the target received power (for example, also referred to as a parameter related to a transmit power offset, a transmit power offset P0, a target received power parameter, etc.).

M _SRS,b,f,c (i) is the SRS bandwidth in number of resource blocks for SRS transmission opportunity i on active UL BWP b of serving cell c and carrier f with subcarrier spacing μ.

α _SRS,b,f,c (q _s ) is provided by α (eg, alpha) for the active UL BWP b of serving cell c and carrier f with subcarrier spacing μ, and the SRS resource set q _s .

PL _{b , f,c} (q _d ) is the DL path loss estimate [dB ] (path loss estimation [dB], path loss compensation). The RS resource index q _d is a path loss reference RS (provided by a path loss reference RS, a path loss measurement DL-RS, e.g., pathlossReferenceRS) associated with the SRS resource set q _s , and is an SS/PBCH block index ( For example, ssb-Index) or CSI-RS resource index (eg, CSI-RS-Index).

If the UE is not provided with pathloss reference RSs (pathlossReferenceRSs), or before the UE is provided with individual upper layer parameters, the UE uses the RS resources obtained from the SS/PBCH block that the UE uses to obtain the MIB. PL _b,f,c (q _d ) is calculated using

h _b,f,c (i,l) is the SRS power control adjustment state for the active UL BWP of carrier f of serving cell c at SRS transmission opportunity i. If the SRS power control adjustment state settings (e.g., srs-PowerControlAdjustmentStates) indicate the same power control adjustment states for SRS transmission and PUSCH transmission, then the current PUSCH power control adjustment state f _b,f,c (i,l ). On the other hand, if the setting of the SRS power control adjustment state indicates independent power control adjustment state for SRS transmission and PUSCH transmission, and the setting of TPC accumulation is not provided, then the SRS power control adjustment state h _{b, f, c} ( i) may be expressed by equation (6).

Here, δ _{SRS, b, f, c} (m) may be a TPC command value that is encoded in combination with other TPC commands within a PDCCH having DCI (for example, DCI format 2_3). . Σ _m=0 ^C(Si)-1 δ _SRS,b,f,c (m) is K of SRS transmission opportunity i−i ₀ on active UL BWP b of serving cell c and carrier f with subcarrier spacing μ of the TPC command value with cardinality C(S i ) received by the UE between SRS (i−i ₀ )−1 symbols before and before K _SRS ( _{i )} symbols of SRS transmission opportunity i. It may be the sum of TPC commands in set S _i . Here, i ₀ is the smallest positive integer such that K _SRS (i - _{i 0 )} -1 symbols before SRS transmission opportunity i-i 0 is earlier than K _SRS (i) symbols before SRS transmission opportunity i. It may be.

If the SRS transmission is aperiodic, then K _SRS (i) is determined after the last symbol of the corresponding PDCCH that triggers the SRS transmission and before the first symbol of the SRS transmission. , may be the number of symbols in active UL BWP b of carrier f of serving cell c. If the SRS transmission is semi-persistent or periodic, K _SRS (i) is the number of symbols per slot in the active UL BWP b of carrier f of serving cell c, N _symb ^slot and , the minimum value of the values provided by k2 in the PUSCH-ConfigCommon, and the number of K _SRS,min symbols.

Note that equations (5) and (6) are merely examples, and are not limited thereto. The user terminal only needs to control the SRS transmission power based on at least one parameter exemplified in equations (5) and (6), and additional parameters may be included or some parameters may be May be omitted. Further, in the above equations (5) and (6), the SRS transmission power is controlled for each BWP of a certain carrier in a certain cell, but the control is not limited to this. At least some of the cells, carriers, BWPs, and power control adjustment states may be omitted.

(TCI, spatial relations, QCL)
In NR, the UE performs reception processing (e.g. reception, demapping, demodulation, Controlling at least one of decoding), transmission processing (eg, at least one of transmission, mapping, precoding, modulation, and encoding) is being considered.

The TCI states may represent those that apply to downlink signals/channels. The equivalent of the TCI state applied to uplink signals/channels may be expressed as a spatial relation.

The TCI state is information regarding quasi-co-location (QCL) of signals/channels, and may also be called spatial reception parameters, spatial relation information, or the like. The TCI state may be set in the UE on a per-channel or per-signal basis.

QCL is a measure of the statistical properties of a signal/channel. For example, when one signal/channel and another signal/channel have a QCL relationship, the Doppler shift, Doppler spread, and average delay are calculated between these different signals/channels. ), delay spread, and spatial parameters (e.g., spatial Rx parameters) can be assumed to be the same (QCL with respect to at least one of these). You may.

Note that the spatial reception parameters may correspond to the UE's receive beam (eg, receive analog beam), and the beam may be identified based on the spatial QCL. QCL (or at least one element of QCL) in this disclosure may be read as sQCL (spatial QCL).

A plurality of types (QCL types) may be defined for QCL. For example, four QCL types A-D may be provided with different parameters (or parameter sets) that can be assumed to be the same, and the parameters (which may be referred to as QCL parameters) are shown below:
・QCL type A (QCL-A): Doppler shift, Doppler spread, average delay and delay spread,
・QCL type B (QCL-B): Doppler shift and Doppler spread,
・QCL type C (QCL-C): Doppler shift and average delay,
- QCL type D (QCL-D): Spatial reception parameters.

It is not possible for the UE to assume that a given Control Resource Set (CORESET), channel or reference signal is in a particular QCL (e.g. QCL type D) relationship with another CORESET, channel or reference signal. , may also be called the QCL assumption.

The UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for the signal/channel based on TCI conditions or QCL assumptions for the signal/channel.

The TCI state may be, for example, information regarding the QCL between a target channel (in other words, a reference signal (RS) for the channel) and another signal (for example, another RS). . The TCI state may be set (indicated) by upper layer signaling, physical layer signaling, or a combination thereof.

In the present disclosure, the upper layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, etc., or a combination thereof.

The MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), or the like. Broadcast information includes, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), and other system information ( Other System Information (OSI)) may also be used.

The physical layer signaling may be, for example, downlink control information (DCI).

Channels for which TCI states or spatial relationships are set (specified) include, for example, the Physical Downlink Shared Channel (PDSCH), the Physical Downlink Control Channel (PDCCH), and the Physical Uplink Shared Channel (Physical Downlink Shared Channel). The channel may be at least one of a physical uplink control channel (PUCCH) and a physical uplink control channel (PUCCH).

In addition, RSs that have a QCL relationship with the channel include, for example, a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a measurement reference signal (Sounding Reference Signal (SRS)), tracking CSI-RS (also referred to as Tracking Reference Signal (TRS)), and QCL detection reference signal (also referred to as QRS).

The SSB is a signal block that includes at least one of a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a broadcast channel (Physical Broadcast Channel (PBCH)). SSB may be called SS/PBCH block.

The TCI state information element ("TCI-state IE" of RRC) set by upper layer signaling may include one or more QCL information ("QCL-Info"). The QCL information may include at least one of information regarding RSs having a QCL relationship (RS relationship information) and information indicating a QCL type (QCL type information). The RS related information includes the RS index (for example, SSB index, Non-Zero-Power (NZP) CSI-RS resource ID (Identifier)), the index of the cell where the RS is located, and the location of the RS. It may also include information such as an index of Bandwidth Part (BWP).

Rel. In T.15 NR, both QCL type A RS and QCL type D RS, or only QCL type A RS may be configured for the UE as the TCI state of at least one of PDCCH and PDSCH.

When TRS is configured as a QCL type A RS, TRS is different from a PDCCH or PDSCH demodulation reference signal (DMRS), and it is assumed that the same TRS is periodically transmitted over a long period of time. be done. The UE can measure the TRS and calculate average delay, delay spread, etc.

A UE configured with the TRS as a QCL type A RS in the TCI state of the DMRS of the PDCCH or PDSCH shall be configured with the same QCL type A parameters (average delay, delay spread, etc.) as the DMRS of the PDCCH or PDSCH and the QCL type A of the TRS. Since it can be assumed that there is a DMRS type A parameter (average delay, delay spread, etc.) of the PDCCH or PDSCH DMRS from the measurement result of the TRS. When performing channel estimation of at least one of PDCCH and PDSCH, the UE can perform more accurate channel estimation using the TRS measurement results.

A UE configured with a QCL type D RS can determine a UE receive beam (spatial domain receive filter, UE spatial domain receive filter) using the QCL type D RS.

An RS of QCL type X in a TCI state may mean an RS that has a QCL type It's okay.

<TCI status for PDCCH>
Information regarding the PDCCH (or the DMRS antenna port associated with the PDCCH) and the QCL with a given RS may be referred to as the TCI state for the PDCCH, etc.

The UE may determine the TCI state for the UE-specific PDCCH (CORESET) based on higher layer signaling. For example, one or more (K) TCI states may be configured for the UE by RRC signaling for each CORESET.

The UE may have one of multiple TCI states set by RRC signaling activated by the MAC CE for each CORESET. The MAC CE may be called a TCI State Indication for UE-specific PDCCH MAC CE. The UE may monitor the CORESET based on the active TCI state corresponding to the CORESET.

<TCI status for PDSCH>
Information regarding the QCL between the PDSCH (or the DMRS antenna port associated with the PDSCH) and a given DL-RS may be referred to as the TCI state for the PDSCH.

The UE may be notified (set) of M (M≧1) TCI states (M QCL information for PDSCH) for PDSCH by upper layer signaling. Note that the number M of TCI states set in the UE may be limited by at least one of the UE capability and the QCL type.

The DCI used for PDSCH scheduling may include a predetermined field (for example, may be called a TCI field, TCI state field, etc.) indicating the TCI state for the PDSCH. The DCI may be used for scheduling PDSCH of one cell, and may be called, for example, DL DCI, DL assignment, DCI format 1_0, DCI format 1_1, etc.

Whether or not the TCI field is included in the DCI may be controlled by information notified from the base station to the UE. The information may be information indicating whether the TCI field is present or absent in the DCI (for example, TCI presence information, TCI presence information in DCI, upper layer parameter TCI-PresentInDCI). The information may be set in the UE by, for example, higher layer signaling.

If more than eight types of TCI states are configured in the UE, the MAC CE may be used to activate (or specify) eight or fewer TCI states. The MAC CE may be referred to as TCI States Activation/Deactivation for UE-specific PDSCH MAC CE. The value of the TCI field within the DCI may indicate one of the TCI states activated by the MAC CE.

If the UE is configured with TCI presence information set to "enabled" for the CORESET that schedules the PDSCH (the CORESET used for PDCCH transmission that schedules the PDSCH), the UE determines whether the TCI field is set to "enabled". It may be assumed that it exists in the DCI format 1_1 of the PDCCH transmitted on the CORESET.

If TCI presence information is not set for the CORESET that schedules the PDSCH, or if the PDSCH is scheduled using DCI format 1_0, the reception of the DL DCI (the DCI that schedules the PDSCH) and the PDSCH corresponding to the DCI To determine the QCL of the PDSCH antenna port, if the time offset between the reception of the PDSCH and the reception of the CORESET used in the PDCCH transmission to schedule the PDSCH, the UE determines the QCL of the PDSCH antenna port. may be assumed to be the same as the TCI state or QCL assumptions applied to the

If the TCI presence information is set to "enabled", the TCI field in the DCI in the component carrier (CC) that schedules (PDSCH) indicates the activated TCI state in the scheduled CC or DL BWP. and the PDSCH is scheduled by DCI format 1_1, the UE uses the TCI according to the value of the TCI field in the detected PDCCH with DCI to determine the QCL of the PDSCH antenna port. Good too. If the time offset between the reception of the DL DCI (scheduling the PDSCH) and the PDSCH corresponding to the DCI (PDSCH scheduled by the DCI) is greater than or equal to the threshold, the UE It may be assumed that the DM-RS port is an RS and a QCL in the TCI state with respect to the QCL type parameter given by the indicated TCI state.

If the UE is configured with a single slot PDSCH, the indicated TCI state may be based on the activated TCI state in the slot with the scheduled PDSCH. If the UE is configured with a multi-slot PDSCH, the indicated TCI state may be based on the activated TCI state in the first slot with a scheduled PDSCH, and the UE You can expect them to be the same. If the UE is configured with a CORESET associated with a search space set for cross-carrier scheduling, the UE shall set the TCI presence information to "enabled" for the corresponding CORESET, and the serving cell scheduled by the search space set. If at least one of the TCI states configured with QCL type D includes QCL type D, the UE may assume that the time offset between the detected PDCCH and the PDSCH corresponding to the PDCCH is greater than or equal to the threshold. good.

In RRC connection mode, DL DCI (PDSCH If the time offset between the reception of a scheduled DCI) and the corresponding PDSCH (PDSCH scheduled by the DCI) is less than a threshold, the UE determines that the DM-RS port of the serving cell's PDSCH One or more CORESETs in the active BWP have the lowest CORESET-ID in the latest slot monitored by the UE and are in the monitored search space. It may be assumed that the RS and QCL of the associated CORESET are related to the QCL parameters used for the QCL indication of the PDCCH (FIG. 1). This RS may be referred to as the PDSCH default TCI state or the PDSCH default QCL assumption.

The time offset between receiving a DL DCI and receiving a PDSCH corresponding to that DCI may be referred to as a scheduling offset.

In addition, the above threshold values are the time duration for QCL, "timeDurationForQCL", "Threshold", "Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", "Threshold-Sched-Offset" , schedule offset threshold, scheduling offset threshold, etc.

The QCL time length may be based on the UE capability, for example, on the delay required for PDCCH decoding and beam switching. The QCL time length may be the minimum time required by the UE to receive PDCCH and apply spatial QCL information received within the DCI for PDSCH processing. The QCL time length may be expressed by the number of symbols for each subcarrier interval, or may be expressed by time (for example, μs). The QCL time length information may be reported from the UE to the base station as UE capability information, or may be set from the base station to the UE using upper layer signaling.

For example, the UE may assume that the DMRS port of the PDSCH is a DL-RS and QCL based on the activated TCI state for the CORESET corresponding to the minimum CORESET-ID. The latest slot may be, for example, the slot that receives the DCI that schedules the PDSCH.

Note that the CORESET-ID may be an ID (ID for identifying the CORESET) set by the RRC information element "ControlResourceSet."

Rel. In 16 and later, when the PDSCH and the PDCCH that schedules it are in different component carriers (CC) (cross carrier scheduling), if the delay from PDCCH to PDSCH (PDCCH-to-PDSCH delay) is or if there is no TCI state in the DCI for this scheduling, the UE shall move from the active TCI state with the lowest ID that is applicable to the PDSCH in the active BWP of the scheduled cell. QCL assumptions for the scheduled PDSCH may be obtained.

<Spatial relationships for PUCCH>
The UE may be configured with parameters (PUCCH configuration information, PUCCH-Config) used for PUCCH transmission by upper layer signaling (for example, Radio Resource Control (RRC) signaling). PUCCH configuration information may be configured for each partial band (for example, upstream bandwidth part (BWP)) within a carrier (cell, also referred to as component carrier (CC)).

The PUCCH configuration information may include a list of PUCCH resource set information (eg, PUCCH-ResourceSet) and a list of PUCCH spatial relationship information (eg, PUCCH-SpatialRelationInfo).

The PUCCH resource set information may include a list (eg, resourceList) of PUCCH resource indexes (IDs, eg, PUCCH-ResourceId).

Additionally, if the UE does not have dedicated PUCCH resource configuration information (e.g., dedicated PUCCH resource configuration) provided by the PUCCH resource set information in the PUCCH configuration information (before RRC setup), the UE The PUCCH resource set may be determined based on a parameter (eg, pucch-ResourceCommon) in the information (eg, System Information Block Type 1 (SIB1) or Remaining Minimum System Information (RMSI)). The PUCCH resource set may include 16 PUCCH resources.

On the other hand, when the UE has the above individual PUCCH resource configuration information (UE individual uplink control channel configuration, individual PUCCH resource configuration) (after RRC setup), the UE determines the PUCCH resource set according to the number of UCI information bits. good.

The UE determines the value of a predetermined field (e.g., PUCCH resource indicator field) in Downlink Control Information (DCI) (e.g., DCI format 1_0 or 1_1 used for PDSCH scheduling), The number of CCEs (N _CCE ) in the control resource set (CONtrol REsource SET (CORESET)) for PDCCH reception that carries the DCI, and the index (n _CCE,0 ) of the head (first) CCE of the PDCCH reception. One PUCCH resource (index) within the PUCCH resource set (for example, a cell-specific or UE-specific PUCCH resource set) may be determined based on at least one.

The PUCCH spatial relationship information (eg, the RRC information element "PUCCH-spatialRelationInfo") may indicate multiple candidate beams (spatial domain filters) for PUCCH transmission. PUCCH spatial relationship information may indicate the spatial relationship between RS (Reference signal) and PUCCH.

The list of PUCCH spatial relationship information may include some elements (PUCCH spatial relationship information IE (Information Element)). Each PUCCH spatial relationship information includes, for example, an index (ID, e.g., pucch-SpatialRelationInfoId) of the PUCCH spatial relationship information, an index (ID, e.g., servingCellId) of the PUCCH spatial relationship information, information regarding the RS (reference RS) that has a spatial relationship with the PUCCH. It may include at least one.

For example, the information regarding the RS may be an SSB index, a CSI-RS index (eg, NZP-CSI-RS resource configuration ID), or an SRS resource ID and a BWP ID. The SSB index, CSI-RS index, and SRS resource ID may be associated with at least one of a beam, a resource, and a port selected by measurement of the corresponding RS.

If more than one spatial relation information regarding the PUCCH is configured, the UE may set one spatial relation information at a certain time based on the PUCCH spatial relation activation/deactivation MAC CE. You may control so that one PUCCH spatial relationship information becomes active with respect to PUCCH resource.

The Rel-15 NR PUCCH spatial relationship activation/deactivation MAC CE is expressed by a total of 3 octets (8 bits x 3 = 24 bits), octets 1-3.

The MAC CE may include information such as the applicable serving cell ID (“Serving Cell ID” field), BWP ID (“BWP ID” field), and PUCCH resource ID (“PUCCH Resource ID” field).

Further, the MAC CE includes a field “S _i ” (i=0-7). When the field of a certain S _i indicates 1, the UE activates the spatial relationship information of the spatial relationship information ID #i. When the field of a certain S _i indicates 0, the UE deactivates the spatial relationship information of the spatial relationship information ID #i.

The UE may activate the PUCCH related information specified by the MAC CE 3 ms after transmitting an acknowledgment (ACK) for the MAC CE activating the predetermined PUCCH spatial related information.

<Spatial relationship for SRS and PUSCH>
The UE receives information (SRS configuration information, e.g., parameters in "SRS-Config" of the RRC control element) used to transmit a measurement reference signal (e.g., Sounding Reference Signal (SRS)). You may.

Specifically, the UE transmits information regarding one or more SRS resource sets (SRS resource set information, e.g., "SRS-ResourceSet" of an RRC control element) and information regarding one or more SRS resources (SRS resource At least one of the RRC control element "SRS-Resource") may be received.

One SRS resource set may be associated with a predetermined number of SRS resources (a predetermined number of SRS resources may be grouped together). Each SRS resource may be identified by an SRS Resource Indicator (SRI) or SRS Resource ID (Identifier).

The SRS resource set information may include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and information on SRS usage.

Here, the SRS resource types are Periodic SRS (P-SRS), Semi-Persistent SRS (SP-SRS), Aperiodic SRS (A-SRS, AP -SRS)) may be indicated. Note that the UE may transmit the P-SRS and SP-SRS periodically (or periodically after activation), and may transmit the A-SRS based on the SRS request of the DCI.

In addition, the usage (RRC parameter "usage", L1 (Layer-1) parameter "SRS-SetUse") is, for example, beam management (beamManagement), codebook-based transmission (codebook: CB), non-codebook-based transmission (nonCodebook: NCB), antenna switching (antennaSwitching), etc. The SRS for codebook-based or non-codebook-based transmission applications may be used to determine the precoder for codebook-based or non-codebook-based PUSCH transmissions based on SRI.

For example, in the case of codebook-based transmission, the UE determines the precoder for PUSCH transmission based on the SRI, Transmitted Rank Indicator (TRI), and Transmitted Precoding Matrix Indicator (TPMI). You may. The UE may determine the precoder for PUSCH transmission based on the SRI for non-codebook-based transmission.

SRS resource information includes SRS resource ID (SRS-ResourceId), SRS port number, SRS port number, transmission Comb, SRS resource mapping (e.g., time and/or frequency resource location, resource offset, resource period, repetition number, SRS (number of symbols, SRS bandwidth, etc.), hopping related information, SRS resource type, sequence ID, SRS spatial relationship information, etc.

The spatial relationship information of the SRS (eg, "spatialRelationInfo" of the RRC information element) may indicate spatial relationship information between the predetermined reference signal and the SRS. The predetermined reference signal includes a synchronization signal/broadcast channel (SS/PBCH) block, a channel state information reference signal (CSI-RS), and an SRS (for example, another SRS). It may be at least one of the following. The SS/PBCH block may be called a synchronization signal block (SSB).

The SRS spatial relationship information may include at least one of an SSB index, a CSI-RS resource ID, and an SRS resource ID as an index of the predetermined reference signal.

Note that in the present disclosure, the SSB index, SSB resource ID, and SSBRI (SSB Resource Indicator) may be read interchangeably. Further, the CSI-RS index, CSI-RS resource ID, and CRI (CSI-RS Resource Indicator) may be read interchangeably. Further, the SRS index, SRS resource ID, and SRI may be read interchangeably.

The SRS spatial relationship information may include a serving cell index, a BWP index (BWP ID), etc. corresponding to the predetermined reference signal.

In NR, transmission of uplink signals may be controlled based on the presence or absence of beam correspondence (BC). BC is, for example, a node (e.g., base station or UE) that determines the beam (transmission beam, Tx beam) to be used for signal transmission based on the beam (reception beam, Rx beam) used for signal reception. It may be the ability to

In addition, BC is transmission/reception beam correspondence (Tx/Rx beam correspondence), beam reciprocity (beam reciprocity), beam calibration (beam calibration), calibrated/non-calibrated (Calibrated/Non-calibrated), reciprocity calibration It may also be referred to as reciprocity calibrated/non-calibrated, degree of correspondence, degree of coincidence, etc.

For example, in the case of no BC, the UE uses the same beam (spatial domain transmission filter) as the SRS (or SRS resources) instructed by the base station based on the measurement results of one or more SRSs (or SRS resources). , uplink signals (for example, PUSCH, PUCCH, SRS, etc.) may be transmitted.

On the other hand, in the case of BC, the UE uses a beam (spatial domain transmit filter) that is the same as or corresponds to the beam (spatial domain receive filter) used for receiving a predetermined SSB or CSI-RS (or CSI-RS resource). Then, uplink signals (for example, PUSCH, PUCCH, SRS, etc.) may be transmitted.

When the UE is configured with spatial relationship information regarding the SSB or CSI-RS and the SRS for a certain SRS resource (for example, when BC is present), the UE determines the spatial domain for reception of the SSB or CSI-RS. The SRS resource may be transmitted using the same spatial domain filter (spatial domain transmit filter) as the filter (spatial domain receive filter). In this case, the UE may assume that the UE receive beam for SSB or CSI-RS and the UE transmit beam for SRS are the same.

For a certain SRS (target SRS) resource, when the UE is configured with spatial relationship information regarding another SRS (reference SRS) and the relevant SRS (target SRS) (for example, in the case of no BC), the UE The target SRS resource may be transmitted using the same spatial domain filter (spatial domain transmit filter) as for the transmission of the target SRS resource. That is, in this case, the UE may assume that the UE transmission beam of the reference SRS and the UE transmission beam of the target SRS are the same.

The UE may determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a predetermined field (eg, SRS resource identifier (SRI) field) in the DCI (eg, DCI format 0_1). Specifically, the UE may use the spatial relationship information (for example, "spatialRelationInfo" of the RRC information element) of the SRS resource determined based on the value of the predetermined field (for example, SRI) for PUSCH transmission.

When using codebook-based transmission for PUSCH, the UE may be configured with two SRS resources by RRC, and may be instructed to use one of the two SRS resources by DCI (1-bit predetermined field). When using non-codebook-based transmission for PUSCH, the UE may have four SRS resources configured by RRC, and one of the four SRS resources may be indicated by DCI (2-bit predetermined field). . In order to use spatial relationships other than the two or four spatial relationships configured by RRC, RRC reconfiguration is required.

Note that DL-RS can be configured for the spatial relationship of SRS resources used for PUSCH. For example, for SP-SRS, a UE can have the spatial relationship of multiple (eg, up to 16) SRS resources configured by RRC and be directed to one of the multiple SRS resources by a MAC CE.

(Spatial relationship of PUSCH scheduled by DCI format 0_0)
DCI format 0_1 includes SRI, but DCI format 0_0 does not include SRI.

Rel. 15 NR, for PUSCH on a cell scheduled with DCI format 0_0, the UE shall use the space corresponding to the dedicated PUCCH resource with the lowest ID in the active UL BWP of that cell, if available. The PUSCH is transmitted according to the relationship. The dedicated PUCCH resource may be a PUCCH resource configured individually for the UE (configured by the upper layer parameter PUCCH-Config).

Therefore, PUSCH cannot be scheduled using DCI format 0_0 for a cell (for example, a secondary cell (SCell)) in which PUCCH resources are not configured.

If PUCCH on SCell (PUCCH transmitted on SCell) is not configured, UCI is transmitted on PCell. If PUCCH on SCell is configured, UCI is sent on PUCCH-SCell. Therefore, PUCCH resources and spatial relationship information are not required to be configured in all SCells, and there may be cells for which PUCCH resources are not configured.

Further, DCI format 0_1 includes a carrier indicator field (CIF), but DCI format 0_0 does not include CIF. Therefore, even if PUCCH resources are configured for PCell, cross-carrier scheduling of PUSCH on SCell cannot be performed using DCI format 0_0 on PCell.

(default spatial relationship)
If, in a certain frequency range (for example, frequency range (FR) 2), spatial relationship information for individual PUCCH configuration or individual SRS configuration, excluding SRS with beam management usage (usage='beamManagement'), is not configured, individual Default spatial relationships may be applied for PUCCH configuration or dedicated SRS configuration.

For example, the default spatial relationship may be the default TCI state (or default QCL assumption) of the PDSCH.

In the case where a CORESET is configured on the CC, the default TCI state of the PDSCH may be the TCI state of the CORESET with the lowest ID in the recent monitored DL slot. In the case where no CORESET is configured on a CC, the default TCI state of the PDSCH may be the activated TCI state with the lowest ID applicable to the PDSCH in the active DL-BWP of that CC.

Default spatial relationships may apply to UEs that support beam correspondence. Default spatial relationships may be applied to single TRP cases.

(Spatial relationship of SRS resource set for antenna switching use)
The UE transmits SRS using each SRS resource in the SRS resource set (SRS-ResourceSet) with antenna switching usage (usage='antennaSwitching'). Such SRS transmission is used for DL precoder determination (DL CSI acquisition). If different spatial relationships are applied to multiple SRS resources in the SRS resource set, the base station cannot properly determine the DL precoder. Therefore, preferably the same spatial relationship applies to all SRS resources within the SRS resource set.

(If path loss reference signal is not set)
As mentioned above, if the UE is not provided with pathloss reference RSs (pathlossReferenceRSs) or before the UE is provided with individual upper layer parameters, the RSs obtained from the SS/PBCH block that the UE uses to obtain the MIB. Consideration is being given to using resources for path loss calculations or using default path loss reference RS. The default path loss reference RS may follow the default spatial relationship DL-RS. For example, if a default spatial relationship assumes a TCI state of a particular CORESET, it may assume a DL-RS of a given QCL type (eg, a QCL type A RS, or a QCL type D RS) for said TCI state. When using the default path loss reference RS, it is possible to match the spatial relationship and the path loss reference RS, which is particularly preferable in multi-TRP deployments. That is, different beams can correspond to different TRPs at different locations.

(problem)
If the UE transmits an SRS for antenna switching over multiple slots and a default spatial relationship is applied to the SRS, the default spatial relationship may be different for each slot. For example, as shown in Figure 2, if the UE transmits SRS1 and SRS2 over multiple slots, the default spatial relationship of SRS1 in one slot is TCI1 of CORESET1, and the default spatial relationship of SRS2 in another slot is TCI1 of CORESET2. It is possible that it is TCI2. Thus, when different spatial relationships are applied to the transmission of SRS for antenna switching applications, the base station cannot properly determine the DL precoder. If the DL precoder is not appropriately determined, system performance, such as throughput, may deteriorate.

Further, when the path loss reference RS follows the default spatial relationship, it is conceivable that the path loss calculation time (number of samples) to be filtered in the upper layer cannot be secured because the path loss reference RS changes every slot. If path loss is not calculated properly, system performance may deteriorate, such as throughput.

Therefore, the present inventors came up with a method for appropriately determining a reference signal for at least one of QCL and path loss calculation for uplink transmission.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The wireless communication methods according to each embodiment may be applied singly or in combination.

In this disclosure, cell, CC, carrier, BWP, and band may be read interchangeably.

In this disclosure, the terms index, ID, indicator, and resource ID may be interchanged.

In this disclosure, specific UL transmission, specific UL signal, specific type of UL transmission, specific UL channel, PUSCH, PUCCH, SRS, P-SRS, SP-SRS, A-SRS may be read interchangeably. In this disclosure, specific DL signal, specific DL resource, specific type of DL transmission, specific DL transmission, specific DL reception, specific DL channel, PDSCH, PDCCH, CORESET, DL-RS, SSB, and CSI-RS are interchangeable. You can.

TCI state, TCI state or QCL assumption, QCL assumption, QCL parameter, spatial domain receive filter, UE spatial domain receive filter, spatial domain filter, UE receive beam, DL receive beam, DL precoding, DL precoder, DL-RS, TCI A QCL type D RS in a state or QCL assumption, and a QCL type A RS in a TCI state or QCL assumption may be read interchangeably. RS of QCL type D, DL-RS associated with QCL type D, DL-RS with QCL type D, source of DL-RS, SSB, and CSI-RS may be read interchangeably.

In this disclosure, the TCI state is information regarding the receive beam (spatial domain receive filter) instructed (configured) to the UE (for example, DL-RS, QCL type, cell where the DL-RS is transmitted, etc.). It's okay. QCL assumption is based on the transmission or reception of associated signals (e.g. PRACH) and information about the received beam (spatial domain receive filter) assumed by the UE (e.g. DL-RS, QCL type, DL-RS transmitted (e.g., a cell that is

In this disclosure, the latest slot, the most recent slot, the latest search space, and the most recent search space may be read interchangeably. In the present disclosure, the terms "lowest ID", "highest ID", and "predetermined (specific) ID" may be interchanged with each other. For example, CORESET with the lowest ID, CORESET with the highest ID, and CORESET with a predetermined ID may be read interchangeably. For example, the active TCI state with the lowest ID, the active TCI state with the highest ID, and the active TCI state with a predetermined ID may be read interchangeably.

In this disclosure, a spatial relationship, spatial relationship information, spatial relationship assumption, QCL parameter, spatial domain transmit filter, UE spatial domain transmit filter, spatial domain filter, UE transmit beam, UL transmit beam, UL precoding, UL precoder, spatial relationship RS, DL-RS, QCL assumption, SRI, spatial relationship based on SRI, and UL TCI may be read interchangeably.

In this disclosure, default TCI state and default QCL assumption may be read interchangeably.

In this disclosure, default spatial relationship, default spatial relationship assumption, RS of QCL of a specific DL resource, TCI state or QCL assumption of a specific DL resource, TCI state or QCL assumption of a specific DL signal, TCI state or QCL assumption of a specific DL signal The RS for the QCL parameters given by , the RS for QCL type D in the TCI state or QCL assumption of a specific DL signal, and the spatial relationship of the reference UL transmission may be read interchangeably.

In this disclosure, "the UE transmits the specific UL transmission according to the default spatial relationship", "the UE uses the default spatial relationship for the spatial relationship of the specific UL transmission", "the UE uses the default spatial relationship for the spatial relationship of the specific UL transmission". "The UE assumes (deems) that the spatial relationship of a specific UL transmission is the same as the QCL type D RS with a default spatial relationship" are mutually exclusive. It may be read differently.

In this disclosure, a TRS, a tracking CSI-RS, a CSI-RS with TRS information (upper layer parameter trs-Info), and an NZP-CSI-RS resource in a NZP-CSI-RS resource set with TRS information are mutually exclusive. It may be read differently.

In the present disclosure, DCI format 0_0, DCI without SRI, DCI without spatial relationship indication, and DCI without CIF may be read interchangeably. In this disclosure, DCI format 0_1, DCI including SRI, DCI including spatial relationship indication, and DCI including CIF may be read interchangeably.

In this disclosure, path loss reference RS, path loss reference RS, path loss estimation RS, path loss calculation RS, pathloss (PL)-RS, index q _d , RS used for path loss calculation, RS resource used for path loss calculation, calculation RS may be read interchangeably. Calculation, estimation, and measurement may be used interchangeably.

(Wireless communication method)
《Default spatial relationship application conditions》
If the default spatial relationship application condition is met, the UE may apply the default spatial relationship to the spatial relationship of a particular UL transmission. The specific UL transmission may be at least one of PUSCH, PUCCH, SRS, P-SRS, SP-SRS, and A-SRS.

A specific UL transmission may be within a specific frequency range (e.g. frequency range (FR)2) and may include an SRS with beam management usage (usage='beamManagement') and an associated CSI-RS ( UL transmission based on individual PUCCH settings or individual SRS settings other than SRS having a non-codebook-based transmission usage (usage='nonCodebook') with settings of CSI-RS) may be used. The specific UL transmission may be a PUSCH scheduled according to DCI format 0_0. For example, a specific UL transmission may be performed by DCI format 0_0 if no PUCCH resource (e.g., dedicated PUCCH resource) with a spatial relationship (e.g., active spatial relationship) is configured in the active UL BWP of the cell. It may be the PUSCH on the cell that is scheduled. The specific UL transmission may be SRS based on SRS resources spanning multiple slots in an SRS resource set for antenna switching usage (usage='antennaSwitching').

The default spatial relationship application condition may be obtained by the logical sum of multiple default spatial relationship application conditions, may be obtained by the logical product of multiple default spatial relationship application conditions, or may be obtained by the logical product of multiple default spatial relationship application conditions. may be obtained by a combination of logical sum and logical product.

The default spatial relationship application conditions are that spatial relationship information for a specific UL transmission is not set, that the specific UL transmission is within a frequency range (for example, frequency range (FR) 2), and that the specific UL transmission is not used for beam management purposes ( Individual PUCCH settings except for SRS with usage='beamManagement') and SRS with non-codebook-based transmission usage (usage='nonCodebook') with associated CSI-RS settings or based on individual SRS settings, and that the UE supports beam correspondence. The spatially related information for a specific UL transmission may be spatially related information within a dedicated PUCCH configuration or a dedicated SRS configuration. The associated CSI-RS may be an ID (index) of a CSI-RS resource associated with an SRS resource set in non-codebook-based transmission.

The default spatial relationship application conditions may include that no path loss reference RS is configured for a specific UL transmission. The default spatial relationship application condition may include that a path loss reference RS is not configured by upper layer signaling for a particular UL transmission.

The default spatial relationship application conditions may include that only one TCI state is active for the PDCCH (the number of active TCI states for the PDCCH is 1). This default spatial relationship application condition simplifies UE operation.

Default spatial relationship application conditions may include that only one TCI state is active for PDCCH and PDSCH (number of active TCI states for PDCCH and PDSCH is 1). UE operation is simplified when using a single active beam for UL and DL.

The default spatial relationship application conditions may include that the PDCCH and the PUCCH scheduled by the PDCCH are in the same BWP or the same CC (cross-carrier scheduling is not used). In the case of cross-carrier scheduling, the UE cannot necessarily apply the same beam to PDCCH and PUCCH, so excluding cross-carrier scheduling simplifies the UE operation. For example, in the case of inter-band carrier aggregation (CA), different beams may be applied to PDCCH and PUCCH. Further, for example, in the case of FR1-FR2 CA, if DCI is in FR1 and PUCCH, SRS, or PUSCH is in FR2, it is conceivable that the UE cannot determine the beam.

Default spatial relationship application conditions may include that interband CA is not used.

Default spatial relationship application conditions may include no SRI for a particular UL transmission PUSCH. The default spatial relationship application condition may include that there are no SRS resources corresponding to SRI for PUSCH.

The default spatial relationship application condition may include that spatial relationship information is not configured for at least one SRS resource in the SRS resource set.

《Default space relationship》
The default spatial relationship may be the RS of the QCL of the specific DL resource.

RS of the QCL of the specific DL resource, the default TCI state or default QCL assumption of the specific DL resource, the TCI state of the CORESET with the lowest CORESET ID in the recent slot, and one or more CORESETs in the active BWP of the serving cell RS for the QCL parameters used for QCL indication of the PDCCH of the CORESET associated with the search space being monitored with the lowest CORESET-ID in the latest slot monitored by the lowest CORESET-ID in the latest slot; the TCI state or QCL assumption of the CORESET that has the lowest CORESET-ID in the particular slot and is associated with the monitored search space; QCL assumption, TCI state of a particular CORESET or QCL assumption, DL signal corresponding to a particular UL transmission (e.g., DL channel that triggers a particular UL transmission, DL channel that schedules a particular UL transmission, DL channel that corresponds to a particular UL transmission) The TCI state or QCL assumption of a DL channel (which schedules a DL channel), the RS regarding the QCL parameters of a specific DL resource, and the RS of the QCL for a specific DL resource may be read interchangeably.

The default spatial relationship or default TCI state or default QCL assumed RS may be a QCL type D RS or a QCL type A RS, if applicable, a QCL type D RS, or a QCL type A RS. It may be RS.

The latest slot may be the latest slot for a particular DL resource. The latest slot may be the latest slot relative to (or before) the starting symbol of a particular UL transmission. The latest slot may be the latest slot (before) the first or last symbol of the DL signal corresponding to a particular UL transmission. For example, if the specific UL transmission is PUCCH, the DL signal corresponding to the specific UL transmission may be a PDSCH corresponding to PUCCH (PDSCH corresponding to HARQ-ACK carried on PUCCH).

The default spatial relationship may be the default TCI state or default QCL assumption of the PDSCH.

The default spatial relationship may be the default TCI state of the PDSCH or the default QCL assumption of the PDSCH. If a CORESET is configured on a CC to which default spatial relationships are applied, the default TCI state of the PDSCH or the default QCL assumption of the PDSCH is the lowest CORESET ID of the most recent slot or recent search space. It may be a TCI state corresponding to . If no CORESET is configured on a CC to which the default spatial relationship applies, the default TCI state of the PDSCH or the default QCL assumption of the PDSCH is applicable to the PDSCH in the active DL BWP of that CC and has the lowest ID. It may be in an activated TCI state.

The specific DL resource may be a PDSCH.

《SRS for antenna switching use》
If the specific UL transmission is an SRS based on SRS resources spanning multiple slots in an SRS resource set for antenna switching usage (usage='antennaSwitching') and the default spatial relationship application conditions are satisfied, the UE uses the SRS resource set in question. A default spatial relationship may be applied to all SRS resources within the network. The UE may apply the default spatial relationship of the SRS resource with the lowest ID among the SRS resources to all of the SRS resources.

<Embodiment 1>
The default spatial relationship may be independent of temporal resources (eg, slot, recent slot). For example, the default spatial relationship may be the TCI state of the CORESET with the lowest ID. For example, in the case where a CORESET is configured on the CC of a particular UL transmission, the default spatial relationship may be the TCI state of the CORESET with the lowest ID in the most recent monitored DL slot. For example, if a CORESET is not configured on a CC for a particular UL transmission, the default spatial relationship is applicable to the PDSCH in the active DL BWP of that CC and may be the activated TCI state with the lowest ID.

The specific UL transmission may be SRS for antenna switching applications.

The default path loss reference RS may or may not follow the default spatial relationship DL-RS.

According to this embodiment, it is possible to prevent the default spatial relationship from changing frequently (every slot).

<Embodiment 2>
If the default path loss reference RS application conditions are satisfied, the default path loss reference RS may be used for path loss calculation. The default path loss reference RS application condition may be obtained by the logical sum of a plurality of default path loss reference RS application conditions, may be obtained by the logical product of a plurality of default path loss reference RS application conditions, or may be obtained by the logical sum of a plurality of default path loss reference RS application conditions. It may be obtained by a combination of logical sum and logical product of reference RS application conditions.

The default pathloss reference RS application conditions may include that the UE is not provided with pathloss reference RSs (pathlossReferenceRSs), or may include that the UE is not provided with individual upper layer parameters.

《Default path loss reference RS application conditions that do not follow default spatial relationships》
The default path loss reference RS may not follow the default spatial relationship of the DL-RS. The definition of the default path loss reference RS may be different from the definition of the default spatial relationship.

The default path loss reference RS may be slot (eg, recent slot) independent. For example, the default path loss reference RS may be the TCI state of the CORESET with the lowest ID. For example, in the case where a CORESET is configured on the CC, the default path loss reference RS may be the TCI state of the CORESET with the lowest ID in the recent monitored DL slot.

《Default path loss reference RS application conditions according to default spatial relationship》
The default path loss reference RS may follow the default spatial relationship DL-RS.

The default path loss reference RS application conditions may include that a single TCI state is activated for the PDCCH (only one TCI state for the PDCCH is activated in all CORESETs in a BWP or CC). .

When a single TCI state is activated for PDCCH, if the TCI state for PDCCH is updated, the default spatial relationship and default path loss reference RS are updated, so that overhead can be suppressed.

Rel. At 15, it may be assumed that a single TCI state is activated for the PDCCH. The network (NW, eg, base station) can know the best beam through beam reporting, and preferably applies the best beam to all PDCCHs and all PDSCHs.

The default spatial relationship for a dedicated PUCCH or a dedicated SRS for a CC in FR2 may be the default TCI state of the PDSCH.

The default spatial relationship for the dedicated PUCCH or dedicated SRS for the CC in FR1 when at least the path loss reference RS is not configured may be the default TCI state of the PDSCH.

If a single TCI state is activated for the PDCCH, for example, as shown in FIG. The DL-RS is updated to the DL-RS (RS of type A or type D of TCI state of PDCCH) corresponding to the TCI state of the PDCCH.

If multiple TCI states are activated for PDCCH, for example, when the TCI state for PDCCH is updated by the MAC CE, as shown in Figure 4, the default spatial relationship corresponds to the TCI state for PDCCH. DL-RS (PDCCH TCI state type A or type D RS). The default path loss reference RS may be a DL-RS configured by at least one of RRC and MAC. The UE may use the DL-RS configured by at least one of RRC and MAC for path loss calculation for a specific UL transmission.

If the path loss reference RS is always the same as the default spatial relationship, the network (NW, eg, base station) does not need to configure or indicate the path loss reference RS. When using a single active TCI state for PDCCH, the NW can automatically update both the default spatial relationship and the path loss reference RS by updating the PDCCH TCI state by the MAC CE. Since the NW does not need to configure both a path loss reference RS and spatial relationship information for a specific UL transmission, signaling (RRC and MAC) overhead can be reduced.

When the path loss reference RS is updated in response to the update of the TCI state for PDCCH by the MAC CE, the calculation time (number of samples) of the path loss to be filtered in the upper layer may not be secured due to the change in the path loss reference RS. Conceivable.

The UE may calculate path loss using any of the following calculation methods 1 to 4.

[Calculation method 1]
If the pathloss reference RS is updated by the MAC CE, a pathloss measurement based on layer 1 (L1)-higher layer filtered reference signal received power (RSRP) may be applied.

[Calculation method 2]
At the available timing after the MAC CE for updating the path loss reference RS, the upper layer filter RSRP is used for path loss measurement, and before the upper layer filter RSRP is applied, the L1-RSRP is used for path loss measurement. Good too.

[Calculation method 3]
At the available timing after the MAC CE for updating the pathloss reference RS, the upper layer filter RSRP is used for pathloss measurement, and before that timing the upper layer filter RSRP of the previous pathloss reference RS is used. Good too.

[Calculation method 4]
Rel. Similar to operation No. 15, the upper layer filter RSRP is used for path loss measurement, and the UE may track all path loss reference RS candidates set by RRC. The maximum number of path loss reference RSs that can be configured by RRC may depend on the UE capabilities.

If the maximum number of path loss reference RSs that can be configured by RRC is Good too. The maximum number of path loss reference RSs that can be set by RRC may be 4, 8, 16, 64, etc.

<Embodiment 3>
If the specific UL transmission is SRS based on an SRS resource set for antenna switching purposes, the default spatial relationship application conditions may include that a single TCI state is activated for the PDCCH.

For example, if the spatial relationship information of an SRS resource for antenna switching is not configured, and the SRS resource spans multiple slots in FR2, and a single TCI state is activated for the PDCCH, the SRS resource The same default spatial relationships may apply to all. The default spatial relationship of the SRS resource with the lowest ID among the SRS resources may be applied to all of the SRS resources.

According to this embodiment, it is possible to prevent the default spatial relationship from changing frequently (every slot).

(wireless communication system)
The configuration of a wireless communication system according to an embodiment of the present disclosure will be described below. In this wireless communication system, communication is performed using any one of the wireless communication methods according to the above-described embodiments of the present disclosure or a combination thereof.

FIG. 5 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). .

Furthermore, the wireless communication system 1 may support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)). MR-DC has dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)).

In EN-DC, an LTE (E-UTRA) base station (eNB) is a master node (Master Node (MN)), and an NR base station (gNB) is a secondary node (Secondary Node (SN)). In NE-DC, the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.

The wireless communication system 1 has dual connectivity between multiple base stations within the same RAT (for example, NR-NR Dual Connectivity (NN-DC) where both the MN and SN are NR base stations (gNB)). )) may be supported.

The wireless communication system 1 includes a base station 11 that forms a macro cell C1 with relatively wide coverage, and base stations 12 (12a-12c) that are located within the macro cell C1 and form a small cell C2 that is narrower than the macro cell C1. You may prepare. User terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when base stations 11 and 12 are not distinguished, they will be collectively referred to as base station 10.

The user terminal 20 may be connected to at least one of the plurality of base stations 10. The user terminal 20 may utilize at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).

Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)). Macro cell C1 may be included in FR1, and small cell C2 may be included in FR2. For example, FR1 may be a frequency band below 6 GHz (sub-6 GHz), and FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and FR1 may correspond to a higher frequency band than FR2, for example.

Further, the user terminal 20 may communicate using at least one of time division duplex (TDD) and frequency division duplex (FDD) in each CC.

The plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication). For example, when NR communication is used as a backhaul between base stations 11 and 12, base station 11, which is an upper-level station, is an Integrated Access Backhaul (IAB) donor, and base station 12, which is a relay station, is an IAB donor. May also be called a node.

Base station 10 may be connected to core network 30 via other base stations 10 or directly. The core network 30 may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), and the like.

The user terminal 20 may be a terminal compatible with at least one of communication systems such as LTE, LTE-A, and 5G.

In the wireless communication system 1, an orthogonal frequency division multiplexing (OFDM)-based wireless access method may be used. For example, in at least one of the downlink (DL) and uplink (UL), Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM (DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), etc. may be used.

A wireless access scheme may be referred to as a waveform. Note that in the wireless communication system 1, other wireless access methods (for example, other single carrier transmission methods, other multicarrier transmission methods) may be used as the UL and DL radio access methods.

In the wireless communication system 1, downlink channels include a physical downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (physical broadcast channel (PBCH)), and a downlink control channel (physical downlink control channel). Channel (PDCCH)) or the like may be used.

In the wireless communication system 1, uplink channels include an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), and a random access channel. (Physical Random Access Channel (PRACH)) or the like may be used.

User data, upper layer control information, System Information Block (SIB), etc. are transmitted through the PDSCH. User data, upper layer control information, etc. may be transmitted by PUSCH. Furthermore, a Master Information Block (MIB) may be transmitted via the PBCH.

Lower layer control information may be transmitted by PDCCH. The lower layer control information may include, for example, downlink control information (DCI) that includes scheduling information for at least one of PDSCH and PUSCH.

Note that the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc., and the DCI that schedules PUSCH may be called UL grant, UL DCI, etc. Note that PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

A control resource set (CORESET) and a search space may be used to detect the PDCCH. CORESET corresponds to a resource for searching DCI. The search space corresponds to a search area and a search method for PDCCH candidates. One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a certain search space based on the search space configuration.

One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels. One or more search spaces may be referred to as a search space set. Note that "search space", "search space set", "search space setting", "search space set setting", "CORESET", "CORESET setting", etc. in the present disclosure may be read interchangeably.

PUCCH allows channel state information (CSI), delivery confirmation information (for example, may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and scheduling request ( Uplink Control Information (UCI) including at least one of SR)) may be transmitted. A random access preamble for establishing a connection with a cell may be transmitted by PRACH.

Note that in the present disclosure, downlinks, uplinks, etc. may be expressed without adding "link". Furthermore, various channels may be expressed without adding "Physical" at the beginning.

In the wireless communication system 1, a synchronization signal (SS), a downlink reference signal (DL-RS), and the like may be transmitted. In the wireless communication system 1, the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DeModulation). Reference Signal (DMRS)), Positioning Reference Signal (PRS), Phase Tracking Reference Signal (PTRS), etc. may be transmitted.

The synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). A signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called an SS/PBCH block, SS Block (SSB), etc. Note that SS, SSB, etc. may also be called reference signals.

In addition, in the wireless communication system 1, measurement reference signals (Sounding Reference Signal (SRS)), demodulation reference signals (DMRS), etc. are transmitted as uplink reference signals (UL-RS). good. Note that DMRS may be called a user terminal-specific reference signal (UE-specific reference signal).

(base station)
FIG. 6 is a diagram illustrating an example of the configuration of a base station according to an embodiment. The base station 10 includes a control section 110, a transmitting/receiving section 120, a transmitting/receiving antenna 130, and a transmission line interface 140. Note that one or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140 may be provided.

Note that this example mainly shows functional blocks that are characteristic of the present embodiment, and it may be assumed that base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 110 controls the base station 10 as a whole. The control unit 110 can be configured from a controller, a control circuit, etc., which will be explained based on common recognition in the technical field related to the present disclosure.

The control unit 110 may control signal generation, scheduling (eg, resource allocation, mapping), and the like. The control unit 110 may control transmission and reception, measurement, etc. using the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140. The control unit 110 may generate data, control information, a sequence, etc. to be transmitted as a signal, and may transfer the generated data to the transmitting/receiving unit 120. The control unit 110 may perform communication channel call processing (setting, release, etc.), status management of the base station 10, radio resource management, and the like.

The transmitting/receiving section 120 may include a baseband section 121, a radio frequency (RF) section 122, and a measuring section 123. The baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212. The transmitting/receiving unit 120 includes a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting/receiving circuit, etc., which are explained based on common understanding in the technical field related to the present disclosure. be able to.

The transmitter/receiver 120 may be configured as an integrated transmitter/receiver, or may be configured from a transmitter and a receiver. The transmitting section may include a transmitting processing section 1211 and an RF section 122. The reception section may include a reception processing section 1212, an RF section 122, and a measurement section 123.

The transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.

The transmitter/receiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc. The transmitter/receiver 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.

The transmitting/receiving unit 120 may form at least one of a transmitting beam and a receiving beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

The transmitting/receiving unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, on the data, control information, etc. acquired from the control unit 110). RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.

The transmitting/receiving unit 120 (transmission processing unit 1211) performs channel encoding (which may include error correction encoding), modulation, mapping, filter processing, and discrete Fourier transform (DFT) on the bit string to be transmitted. A baseband signal may be output after performing transmission processing such as processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion.

The transmitting/receiving unit 120 (RF unit 122) may perform modulation, filter processing, amplification, etc. on the baseband signal in a radio frequency band, and may transmit the signal in the radio frequency band via the transmitting/receiving antenna 130. .

On the other hand, the transmitting/receiving section 120 (RF section 122) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.

The transmitting/receiving unit 120 (reception processing unit 1212) performs analog-to-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) processing (if necessary), applying reception processing such as filter processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing, User data etc. may also be acquired.

The transmitting/receiving unit 120 (measuring unit 123) may perform measurements regarding the received signal. For example, the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal. The measurement unit 123 measures reception power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)). , signal strength (for example, Received Signal Strength Indicator (RSSI)), propagation path information (for example, CSI), etc. may be measured. The measurement results may be output to the control unit 110.

The transmission path interface 140 transmits and receives signals (backhaul signaling) between devices included in the core network 30, other base stations 10, etc., and transmits and receives user data (user plane data) for the user terminal 20, control plane It is also possible to acquire and transmit data.

Note that the transmitting unit and receiving unit of the base station 10 in the present disclosure may be configured by at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140.

(user terminal)
FIG. 7 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control section 210, a transmitting/receiving section 220, and a transmitting/receiving antenna 230. Note that one or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.

Note that this example mainly shows functional blocks that are characteristic of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.

The control unit 210 controls the entire user terminal 20. The control unit 210 can be configured from a controller, a control circuit, etc., which will be explained based on common recognition in the technical field related to the present disclosure.

The control unit 210 may control signal generation, mapping, and the like. The control unit 210 may control transmission and reception using the transmitting/receiving unit 220 and the transmitting/receiving antenna 230, measurement, and the like. The control unit 210 may generate data, control information, sequences, etc. to be transmitted as a signal, and may transfer the generated data to the transmitting/receiving unit 220.

The transmitting/receiving section 220 may include a baseband section 221, an RF section 222, and a measuring section 223. The baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212. The transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measuring circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field related to the present disclosure.

The transmitting/receiving section 220 may be configured as an integrated transmitting/receiving section, or may be configured from a transmitting section and a receiving section. The transmitting section may include a transmitting processing section 2211 and an RF section 222. The reception section may include a reception processing section 2212, an RF section 222, and a measurement section 223.

The transmitting/receiving antenna 230 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.

The transmitter/receiver 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmitter/receiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.

The transmitting/receiving unit 220 may form at least one of a transmitting beam and a receiving beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.

The transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (e.g. RLC retransmission control), MAC layer processing (e.g. , HARQ retransmission control), etc., to generate a bit string to be transmitted.

The transmitting/receiving unit 220 (transmission processing unit 2211) performs channel encoding (which may include error correction encoding), modulation, mapping, filter processing, DFT processing (as necessary), and IFFT processing on the bit string to be transmitted. , precoding, digital-to-analog conversion, etc., and output a baseband signal.

Note that whether or not to apply DFT processing may be based on the settings of transform precoding. When transform precoding is enabled for a certain channel (for example, PUSCH), the transmitting/receiving unit 220 (transmission processing unit 2211) performs the above processing in order to transmit the channel using the DFT-s-OFDM waveform. DFT processing may be performed as the transmission processing, or if not, DFT processing may not be performed as the transmission processing.

The transmitting/receiving unit 220 (RF unit 222) may perform modulation, filter processing, amplification, etc. on the baseband signal in a radio frequency band, and may transmit the signal in the radio frequency band via the transmitting/receiving antenna 230. .

On the other hand, the transmitting/receiving section 220 (RF section 222) may perform amplification, filter processing, demodulation into a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.

The transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, and decoding (error correction) on the acquired baseband signal. (which may include decoding), MAC layer processing, RLC layer processing, and PDCP layer processing may be applied to obtain user data and the like.

The transmitting/receiving section 220 (measuring section 223) may perform measurements regarding the received signal. For example, the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal. The measurement unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like. The measurement results may be output to the control unit 210.

Note that the transmitting unit and receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.

The control unit 210 may calculate a path loss based on a reference signal in a transmission control instruction (TCI) state of a specific downlink resource in a case where a path loss reference signal and spatial relationship information are not set for specific uplink transmission. . The transmitting/receiving unit 220 may perform the specific uplink transmission using transmission power based on the path loss.

In the case, if a single TCI state is activated for a physical downlink control channel, the controller 210 may calculate the path loss based on a default spatial relationship of the specific uplink transmission.

The specific downlink resource may be slot-independent.

The reference signal may follow a default spatial relationship of the particular uplink transmission.

The reference signal may not follow a default spatial relationship of the particular uplink transmission.

(Hardware configuration)
It should be noted that the block diagram used to explain the above embodiment shows blocks in functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method for realizing each functional block is not particularly limited. That is, each functional block may be realized using one physically or logically coupled device, or may be realized using two or more physically or logically separated devices directly or indirectly (e.g. , wired, wireless, etc.) and may be realized using a plurality of these devices. The functional block may be realized by combining software with the one device or the plurality of devices.

Here, functions include judgment, decision, judgement, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and consideration. , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. Not limited. For example, a functional block (configuration unit) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.

For example, a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 8 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment. The base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc. .

Note that in the present disclosure, words such as apparatus, circuit, device, section, unit, etc. can be read interchangeably. The hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some of the devices.

For example, although only one processor 1001 is shown, there may be multiple processors. Also, the processing may be performed by one processor, or the processing may be performed by two or more processors simultaneously, sequentially, or using other techniques. Note that the processor 1001 may be implemented using one or more chips.

Each function in the base station 10 and the user terminal 20 is performed by, for example, loading predetermined software (program) onto hardware such as a processor 1001 and a memory 1002, so that the processor 1001 performs calculations and communicates via the communication device 1004. This is achieved by controlling at least one of reading and writing data in the memory 1002 and storage 1003.

The processor 1001, for example, operates an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) that includes interfaces with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, at least a portion of the above-mentioned control unit 110 (210), transmitting/receiving unit 120 (220), etc. may be realized by the processor 1001.

Furthermore, the processor 1001 reads programs (program codes), software modules, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes in accordance with these. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated in the processor 1001, and other functional blocks may also be realized in the same way.

Memory 1002 is a computer-readable storage medium, such as at least Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or other suitable storage medium. It may be composed of one. Memory 1002 may be called a register, cache, main memory, or the like. The memory 1002 can store executable programs (program codes), software modules, and the like to implement a wireless communication method according to an embodiment of the present disclosure.

The storage 1003 is a computer-readable recording medium, such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM), etc.), a digital versatile disk, removable disk, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium. It may be configured by Storage 1003 may also be called an auxiliary storage device.

The communication device 1004 is hardware (transmission/reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be configured to include. For example, the above-described transmitting/receiving unit 120 (220), transmitting/receiving antenna 130 (230), etc. may be realized by the communication device 1004. The transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).

The input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Further, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or may be configured using different buses for each device.

The base station 10 and the user terminal 20 also include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured to include hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these hardwares.

(Modified example)
Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, channel, symbol and signal may be interchanged. Also, the signal may be a message. The reference signal may also be abbreviated as RS, and may be called a pilot, pilot signal, etc. depending on the applicable standard. Further, a component carrier (CC) may be called a cell, a frequency carrier, a carrier frequency, or the like.

A radio frame may be composed of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting a radio frame may be called a subframe. Furthermore, a subframe may be composed of one or more slots in the time domain. A subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.

Here, the numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology includes, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, and radio frame configuration. , a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.

A slot may be constituted by one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain. Furthermore, a slot may be a time unit based on numerology.

A slot may include multiple minislots. Each minislot may be made up of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot. A minislot may be made up of fewer symbols than a slot. PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.

Radio frames, subframes, slots, minislots, and symbols all represent time units for transmitting signals. Other names may be used for the radio frame, subframe, slot, minislot, and symbol. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.

For example, one subframe may be called a TTI, multiple consecutive subframes may be called a TTI, and one slot or minislot may be called a TTI. In other words, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be. Note that the unit representing the TTI may be called a slot, minislot, etc. instead of a subframe.

Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis. Note that the definition of TTI is not limited to this.

The TTI may be a transmission time unit of a channel-coded data packet (transport block), a code block, a codeword, etc., or may be a processing unit of scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.

Note that when one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc. A TTI that is shorter than a normal TTI may be referred to as an abbreviated TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, or the like.

Note that long TTI (for example, normal TTI, subframe, etc.) may be read as TTI with a time length exceeding 1 ms, and short TTI (for example, short TTI, etc.) It may also be read as a TTI having the above TTI length.

A resource block (RB) is a unit of resource allocation in the time domain and frequency domain, and may include one or more continuous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the numerology, and may be 12, for example. The number of subcarriers included in an RB may be determined based on numerology.

Additionally, an RB may include one or more symbols in the time domain and may be one slot, one minislot, one subframe, or one TTI long. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

Note that one or more RBs include a physical resource block (Physical RB (PRB)), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, and an RB. They may also be called pairs.

Further, a resource block may be configured by one or more resource elements (REs). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

Bandwidth Part (BWP) (also called partial bandwidth, etc.) refers to a subset of contiguous common resource blocks (RBs) for a certain numerology in a certain carrier. Good too. Here, the common RB may be specified by an RB index based on a common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL). One or more BWPs may be configured within one carrier for a UE.

At least one of the configured BWPs may be active and the UE may not expect to transmit or receive a given signal/channel outside of the active BWP. Note that "cell", "carrier", etc. in the present disclosure may be replaced with "BWP".

Note that the structures of the radio frame, subframe, slot, minislot, symbol, etc. described above are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of symbols included in an RB, The number of subcarriers, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.

In addition, the information, parameters, etc. described in this disclosure may be expressed using absolute values, relative values from a predetermined value, or using other corresponding information. may be expressed. For example, radio resources may be indicated by a predetermined index.

The names used for parameters and the like in this disclosure are not limiting in any respect. Furthermore, the mathematical formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure. Since the various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable designation, the various names assigned to these various channels and information elements are not in any way exclusive designations. .

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., which may be referred to throughout the above description, may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination of

Further, information, signals, etc. may be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layer. Information, signals, etc. may be input and output via multiple network nodes.

Input/output information, signals, etc. may be stored in a specific location (eg, memory) or may be managed using a management table. Information, signals, etc. that are input and output can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.

Notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods. For example, the information notification in this disclosure may be performed using physical layer signaling (e.g., Downlink Control Information (DCI), uplink control information (UCI)), upper layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), Medium Access Control (MAC) signaling), other signals, or a combination thereof. It may be carried out by

Note that the physical layer signaling may be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc. Further, RRC signaling may be called an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like. Further, MAC signaling may be notified using, for example, a MAC Control Element (CE).

Further, notification of prescribed information (for example, notification of "X") is not limited to explicit notification, but may be made implicitly (for example, by not notifying the prescribed information or by providing other information) (by notification).

The determination may be made by a value expressed by 1 bit (0 or 1), or by a boolean value expressed by true or false. , may be performed by numerical comparison (for example, comparison with a predetermined value).

Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.

Additionally, software, instructions, information, etc. may be sent and received via a transmission medium. For example, if the software uses wired technology (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (such as infrared, microwave) to , a server, or other remote source, these wired and/or wireless technologies are included within the definition of a transmission medium.

As used in this disclosure, the terms "system" and "network" may be used interchangeably. "Network" may refer to devices (eg, base stations) included in the network.

In this disclosure, "precoding", "precoder", "weight (precoding weight)", "quasi-co-location (QCL)", "Transmission Configuration Indication state (TCI state)", "spatial "spatial relation", "spatial domain filter", "transmission power", "phase rotation", "antenna port", "antenna port group", "layer", "number of layers", Terms such as "rank", "resource", "resource set", "resource group", "beam", "beam width", "beam angle", "antenna", "antenna element", and "panel" are interchangeable. can be used.

In this disclosure, "Base Station (BS)", "Wireless base station", "Fixed station", "NodeB", "eNB (eNodeB)", "gNB (gNodeB)", "Access point", "Transmission Point (TP)", "Reception Point (RP)", "Transmission/Reception Point (TRP)", "Panel" , "cell," "sector," "cell group," "carrier," "component carrier," and the like may be used interchangeably. A base station is sometimes referred to by terms such as macrocell, small cell, femtocell, and picocell.

A base station can accommodate one or more (eg, three) cells. If a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is divided into base station subsystems (e.g., small indoor base stations (Remote Radio Communication services can also be provided by the Head (RRH)). The term "cell" or "sector" refers to part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage.

In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" are used interchangeably. can be done.

A mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal. , handset, user agent, mobile client, client, or some other suitable terminology.

At least one of a base station and a mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like. Note that at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, or the like. The moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (manned or unmanned). ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

Furthermore, the base station in the present disclosure may be replaced by a user terminal. For example, communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.). Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the user terminal 20 may have the functions that the base station 10 described above has. Further, words such as "upstream" and "downstream" may be replaced with words corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may be replaced with side channels.

Similarly, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may have the functions that the user terminal 20 described above has.

In this disclosure, the operations performed by the base station may be performed by its upper node in some cases. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (e.g. It is clear that this can be done by a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc. (but not limited to these) or a combination thereof.

Each aspect/embodiment described in this disclosure may be used alone, may be used in combination, or may be switched and used in accordance with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure use an example order to present elements of the various steps and are not limited to the particular order presented.

Each aspect/embodiment described in this disclosure is applicable to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system ( 4G), 5th generation mobile communication system (5G), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802. 20, Ultra-WideBand (UWB), Bluetooth (registered trademark), and other appropriate wireless communication methods, and next-generation systems expanded based on these may be applied. Furthermore, a combination of multiple systems (for example, a combination of LTE or LTE-A and 5G) may be applied.

As used in this disclosure, the phrase "based on" does not mean "based solely on" unless explicitly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

As used in this disclosure, any reference to elements using the designations "first," "second," etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in any way.

As used in this disclosure, the term "determining" may encompass a wide variety of actions. For example, "judgment" can mean judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry ( For example, searching in a table, database, or other data structure), ascertaining, etc. may be considered to be "determining."

In addition, "judgment (decision)" includes receiving (e.g., receiving information), transmitting (e.g., sending information), input (input), output (output), access ( may be considered to be "determining", such as accessing data in memory (eg, accessing data in memory).

In addition, "judgment" is considered to mean "judging" resolving, selecting, choosing, establishing, comparing, etc. Good too. In other words, "judgment (decision)" may be considered to be "judgment (decision)" of some action.

Further, "judgment (decision)" may be read as "assuming", "expecting", "considering", etc.

As used in this disclosure, the terms "connected", "coupled", or any variations thereof refer to any connection or coupling, direct or indirect, between two or more elements. can include the presence of one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, "connection" may be replaced with "access."

In this disclosure, when two elements are connected, they may be connected using one or more electrical wires, cables, printed electrical connections, etc., as well as in the radio frequency domain, microwave can be considered to be "connected" or "coupled" to each other using electromagnetic energy having wavelengths in the light (both visible and invisible) range.

In the present disclosure, the term "A and B are different" may mean "A and B are different from each other." Note that the term may also mean that "A and B are each different from C". Terms such as "separate" and "coupled" may also be interpreted similarly to "different."

Where "include", "including" and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising". It is intended that Furthermore, the term "or" as used in this disclosure is not intended to be exclusive or.

In this disclosure, when articles are added by translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are plural.

Although the invention according to the present disclosure has been described in detail above, it is clear for those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the invention as determined based on the claims. Therefore, the description of the present disclosure is for the purpose of illustrative explanation and does not have any limiting meaning on the invention according to the present disclosure.

Claims (6)

a receiver for receiving information regarding one transmission configuration indication (TCI) status for a control resource set (CORESET);
When the CORESET is set in a component carrier of a sounding reference signal (SRS) resource, the reference signal of the one TCI state, which is the quasi colocation assumption of the CORESET, is set in a spatial relationship for the SRS and the reference signal of the one TCI state, which is a quasi colocation assumption of the CORESET. a control unit for use in path loss estimation ;
The control unit is configured such that spatial relationship information is not set for a first SRS resource in the SRS resource set, and spatial relationship information is set for a second SRS resource in the SRS resource set. and if the time of the second SRS resource is different from the time of the first SRS resource, the terminal applies the same spatial relationship to the first SRS resource and the second SRS resource. The terminal according to claim 1 , wherein slots of the second SRS resource are different from slots of the first SRS resource. The terminal according to claim 1 or 2 , wherein the SRS resource set is an SRS resource set for antenna switching. receiving information regarding one transmission configuration indication (TCI) status for a control resource set (CORESET);
When the CORESET is set in a component carrier of a sounding reference signal (SRS) resource, the reference signal of the one TCI state, which is the quasi colocation assumption of the CORESET, is set in a spatial relationship for the SRS and the reference signal of the one TCI state, which is a quasi colocation assumption of the CORESET. and a step for using path loss estimation for the
Spatial relationship information is not set for a first SRS resource in the SRS resource set, and spatial relationship information is not set for a second SRS resource in the SRS resource set, and If the time of the second SRS resource is different from the time of the first SRS resource, applying the same spatial relationship to the first SRS resource and the second SRS resource. Communication method. a transmitter configured to transmit information regarding one transmission configuration indication (TCI) status for a control resource set (CORESET);
When the CORESET is configured in a component carrier of a resource of a sounding reference signal (SRS), a control for controlling the reception of the SRS to which a spatial relationship for the SRS and a path loss estimation for the SRS are applied. has a section and a
The spatial relationship and the path loss estimation are based on the reference signal of the one TCI state that is assumed to be quasi colocation of the CORESET, and spatial relationship information is set for the first SRS resource in the SRS resource set. first, and spatial relationship information is not set for a second SRS resource in the SRS resource set, and the time of the second SRS resource is different from the time of the first SRS resource, The base station , wherein the same spatial relationship applies to the first SRS resource and the second SRS resource . A system including a terminal and a base station,
The terminal is
a receiver for receiving information regarding one transmission configuration indication (TCI) status for a control resource set (CORESET);
When the CORESET is set in a component carrier of a sounding reference signal (SRS) resource, the reference signal of the one TCI state, which is the quasi colocation assumption of the CORESET, is set in a spatial relationship for the SRS and the reference signal of the one TCI state, which is a quasi colocation assumption of the CORESET. a control unit for use in path loss estimation;
The control unit is configured such that spatial relationship information is not set for a first SRS resource in the SRS resource set, and spatial relationship information is set for a second SRS resource in the SRS resource set. and the time of the second SRS resource is different from the time of the first SRS resource, applying the same spatial relationship to the first SRS resource and the second SRS resource;
The base station is
a transmitter that transmits information regarding the one TCI state;
A system comprising: a receiving unit that receives the SRS.

Images